可再加工和可回收材料通过可逆的Thia-Michael反应进行3D打印
Yong-Liang Su1, Liang Yue2, McKinley K Paul1
1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, United States.
Angewandte Chemie (International ed. in English)
|January 20, 2025
概括
化学可回收聚乙烯 (PCTE) 为3D打印提供了一个可持续的解决方案. 这些聚合物具有出色的机械性能,可以完全回收到它们的原始单体中,从而实现闭环系统.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续的制造业 可持续的制造业
背景情况:
- 塑料废物是一个重要的环境问题,需要开发可回收材料.
- 增材制造或3D打印提供了设计灵活性,但通常依赖于不可回收的塑料.
- 实现聚合物循环经济需要具有固有的可回收性创新材料.
研究的目的:
- 引入一种新型的化学可回收聚合物类别,即聚乙烯 (PCTE).
- 评估这些新聚合物的合成,机械性能和3D打印性能.
- 为了证明PCTE的闭环可回收性,以实现可持续的添加剂制造.
主要方法:
- 通过迈克尔添加-消除环开放聚合 (MAEROP) 合成循环烯 (CTE) 单体.
- 由此产生的聚乙烯 (PCTE) 对于机械性能和热稳定性的表征.
- 使用化纤维制造 (FFF) 进行PCTE的3D打印,并评估可打印性和可回收性.
主要成果:
- PCTE单体很容易合成,可扩展和模块化.
- 与聚乙烯和聚烯等商品聚烯相比,PCTE具有优越的机械性能.
- PCTE-Ph 显示出出色的3D打印能力,并且在回收后保留了机械强度和热稳定性.
- 在脱聚合后,PCTE-Ph获得了90%的产量,从而实现了成功的重聚合.
结论:
- 聚乙烯 (PCTE) 是一种有前途的可持续聚合物,可用于3D打印.
- 开发的MAEROP工艺允许创建高性能,可回收材料.
- PCTE促进了闭环生命周期,在增材制造中为传统塑料提供了可行的替代品.
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